package com.itheima.reggie.contraller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.pojo.Category;
import com.itheima.reggie.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@Slf4j
@RequestMapping("category")
public class CategoryController {

    @Autowired
    private CategoryService categoryService;

    //新增分类
    @PostMapping
    public R<String> save(@RequestBody Category category) {
        log.info("category:{}", category);
        categoryService.save(category);
        return R.success("添加分类成功");
    }

    //分页查询
    @GetMapping("/page")
    public R<Page<Category>> page(@RequestParam(name = "page", required = false, defaultValue = "1") Integer page,
                                  Integer pageSize)
    {

        //<Category>可以不传,,为了刚进去就有东西,所以有默认这三个---name = "page"统一命名,required = false不符合的话不带后面的page值进去(默认是true带后面的),defaultValue = "1"默认分类值为1


        //1.构造分页对象
        Page<Category> pageInfo=new Page<>(page,pageSize);

        //2.构造条件对象
        QueryWrapper<Category> queryWrapper = new QueryWrapper<>();
        queryWrapper.orderByDesc("sort").orderByDesc("update_time");//字段排名之后,如果字段一样的话,那就比较更新时间(都是降序排列)

        //3.分页查询
        categoryService.page(pageInfo, queryWrapper);

        return R.success(pageInfo);

      /*
         分页查询

        @GetMapping("page1")
        public R<Page<Category>> page(Integer page, Integer pageSize) {
        //分页构造器
        Page<Category> pageInfo = new Page<>(page, pageSize);
        //条件构造器
        LambdaQueryWrapper<Category> queryWrapper = new LambdaQueryWrapper<>();
        //添加排序条件，根据sort进行排序
        queryWrapper.orderByAsc(Category::getSort);
        //分页查询
        categoryService.page(pageInfo, queryWrapper);
        return R.success(pageInfo);*/
    }


    //根据id删除分类
    @DeleteMapping
    public R<String> delete(Long id) {
        log.info("删除分类，id为：{}", id);
        //改造前:categoryService.removeById(id);
        categoryService.remove(id);
        return R.success("删除分类成功");
    }




     //根据条件查询分类数据

    @GetMapping("list")
    public R<List<Category>> list(Integer type) {
        //条件构造器(构造条件)
        LambdaQueryWrapper<Category> queryWrapper = new LambdaQueryWrapper<>();
        //添加条件
        queryWrapper.eq(type != null, Category::getType, type);
        //添加排序条件(查询数据)
        queryWrapper.orderByAsc(Category::getSort);
        List<Category> list = categoryService.list(queryWrapper);
        return R.success(list);
    }


    }

